Replace curly quotes with straight quotes

Curly quotes usually input from Chinese input method.
When read from english context, it makes some confusion.

Change-Id: I6209f92de2a5b136c2c16decfe5752f5c44096ff
diff --git a/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml b/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml
index 775a383..a002fb8 100644
--- a/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml
+++ b/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml
@@ -1,6 +1,6 @@
 ---
 fixes:
   - |
-    Fix list_group_snapshots API in v3 group_snapshots_client: Bug#1715786.
+    Fix list_group_snapshots API in v3 group_snapshots_client: Bug#1715786.
     The url path for list group snapshots with details API is changed from
     ``?detail=True`` to ``/detail``.